用清晰

• If you publish printed copies ( or copies in media that commonly have printed covers ) of the document , numbering more than 100 , and the document ' s license notice requires cover texts , you must enclose the copies in covers that carry , clearly and legibly , all these cover texts : front - cover texts on the front cover , and back - cover texts on the back cover
  如果你发布了付印的文档副本(或使用其它一般有印有封皮的媒质的副本)数量超过100份，你必须把副本用清晰明了地印有文档的许可声明要求的封皮文字的封皮封装好，这些封皮文字包括封面文字和封底文字。